#!/usr/bin/env php
<?php

# for PHP 5.3 use "Closure"
$strtoupper = function($s) { return strtoupper($s); };

$fruits = array('apple', 'orange', 'cherry');
$stars  = array('sun', 'moon', 'earch');

echo implode('-', array_map($strtoupper, $fruits)) . "\r\n";  // APPLE-ORANGE-CHERRY
echo implode('-', array_map($strtoupper, $stars)) . "\r\n";  // SUN-MOON-EARCH